Its not that interesting. Distillation works but its not healthy to consume. You could distill the water without plastics involved but then you need to add back minerals before drinking.
Debunked urban legend. Likely retcon from various mythology involving the chemistry lab's "deionized water" bottle which every chemistry teacher has to make up convincing reasons for the class not to drink from.
Maybe my thinking has been wrong. I always thought you would need to supplement for some of the minerals you might be getting from the water. I could be totally wrong here then, will need to do more reading.
Any water you drink is already very much hypotonic relative to your bodily fluids. Your minerals mostly come from your food, not your water.
I’m no expert on biology (I’m a chemist), but I drank quite a bit of DI water in grad school because the tap water was so gross.
Also, heavy water (D2O) tastes sweet. And it also won’t kill you when consumed, contrary to urban legend (at least not in quantities you can reasonably afford).
Deuterium oxide will kill you only after deuterium replaces a significant portion of all your body's hydrogen atoms, like maybe 50+%. https://www.youtube.com/watch?v=fyK6kPi8k78
Yes, and as another poster pointed out my thinking that the importance of those minerals might be incorrect. I always thought you needed to supplement on top of distilled water.
For RO, a lot of the systems include a mineral cartridge.
It’s for taste. Distilled water tastes like crap. I don’t know the science behind it, but “good” water (eg coming from hetch hetchy) tastes amazing in comparison.